This Demonstration calculates the mole fractions of gases dissolved in water. Check "set temperature" to display mole fractions in a bar graph and set the temperature with a slider. Uncheck "set temperature" to plot mole fractions as a function of temperature and hover the cursor over a curve to see which gas it corresponds to. Only the gases whose boxes are checked are displayed. The mole fractions are calculated independently for each gas at the gas pressure (set with a slider).